Lightpollution map

Survey maps are an essential tool for any property owner. They provide detailed information about the boundaries of a property, as well as any features that may be present on the l...World light pollution statistics. VIIRS Country statistics. Help. ALL COUNTRIES. OECD. EEA +UK +CH. G20. Aurora may interfere in * countries. Read Help on how statistics are calculated. ...Interactive Light Pollution Map. A map showing how light pollution varies across the world. Physics Geography Astronomy Maps pollution. This interactive map shows the …The layer uses a color-coded scale to display the Bortle scale assigned to the different locations. Light pollution map built using the World Atlas 2015 data. In these color-coded scales, Black corresponds to Class 1 (the darkest sky) of the Bortle scale and White to Class 9 ( a typical inner city sky).Today’s map, from geographer and journalist, Tim Wallace, is a different perspective on light pollution in the United States. The map was created by subtracting population from light output, which highlights areas that throw off more light than predicted given their population density. On this style of map, it isn’t the glowing metropolitan ...The real power of the Blue Marble and Lightpollution.info maps is in the ability to look at regions of the Earth over time to see whether the amount of light leaving the ground is changing for better — or worse. This image compares VIIRS images of the Niger River delta in southern Nigeria in 2012 (left) and 2015 (right).Light Pollution Map (ISTIL) Human Footprint Map (GIBS/NASA) Geolocation (only at the request of the user) Search by city. Create a location with a simple click on the map. Bed … England’s Light Pollution and Dark Skies You will need to tick the boundary you want to view in the legend before the district or National Character Area boundary will show on screen. Click the map to find detailed information about that area. Dark Sky Map contains Google Maps overlays and allows astronomers to search for suitable spots using the satellite view and data from light pollution charts. You can add a spot to the map and a description is automatically populated with an overview of the quality of the sky in that location and ratings from other stargazers.Light Pollution Map. View the Light Pollution Map. Guidelines on reducing the impact of light pollution. Light Pollution Guidelines. Quick Links. Contact. Dark Sky Park. Discover. Groups. Learn. Schools. Viewing Points. Visit. Visitor Centre. News. What's On. Festival. Welcome to Mayo Dark Sky Park. Mayo is now home to Ireland’s first International Dark …Cook Forest State Park and its beautiful starscape are right in the middle of this map from LightPollutionMap.info, and you can see the illumination hotspots creeping toward us from all directions. Internationally, light pollution has increased by 6 to 10% each year, spilling from property to property, chasing darkness and its wildlife deeper into ever-shrinking …NASA’s Black Marble enables a wide range of applications for a broad spectrum of data users. Along with their primary purpose of supporting the short-term weather prediction and disaster response communities, they also provide new data for tracking wildfires, gas flares, and light pollution, and have numerous socioeconomic uses, such as proxying …in Alberta. Colors indicate light pollution ratings. Only non-private charts in Alberta shown: 149 of 6171 in North America. This map shows where astronomy-specific weather forecasts, or "clear sky charts", are available. The colors of the markers indicate amount of light pollution there (colors defined ). You can: Click and drag to pan the map.On this map, light pollution in low-populated areas shows the site of industrial activity, including shale oil extraction. From the bright lights of Times Square to the high-powered flood lights of a suburban Walmart, we expect our cities to give off a certain amount of light pollution. Even though our view of the …The DMSP satellite and its Operational Linescan System. The World Atlas of sea level artificial night sky brightness. Maps of the artificial night sky brightness. Maps of the total night sky brightness. Maps of the naked eye stellar visibility. Maps of the number of visible stars. Maps of the growth of light pollution.Interactive Light Pollution Map. A map showing how light pollution varies across the world. Physics Geography Astronomy Maps pollution. This interactive map shows the …Light Pollution Map w/ Bortle. On the left is a 2019 satellite image of CO showing light pollution from the NOAA National Geophysical Data Center. On the right is a 2015 light pollution map showing sky brightness at the zenith from World Atlas data. Colors correspond approximately to the Bortle scale. A map showing the domain of the 6 continent-scale maps is below. There are two versions of each map: one with borders and coastlines and the other with nothing except light pollution. The resolution of most maps is 1/120 degrees. The medium resolution world maps are 1/40 degrees. I've used an "expanded color scale" for all maps. The light pollution map has two base layers (road and hybrid Bing maps), VIIRS/World Atlas/Clouds/Aurora overlays and a point feature overlay (SQM, SQC and Observatories). If you want detailed analysis of radiance (VIIRS/DMSP) changes over a period of time, then please use the Lighttrends web application (not mobile optimised).Choices: Add Light Pollution map: Intensity: 0% 100% | Show All Charts | Show detailed list: Colors indicate light pollution ratings. Only non-private charts in Ohio shown: 125 of 6171 in North America. Zoom out to All Charts Map (slow) Nearby: Indiana Kentucky Michigan Pennsylvania West Virginia: How to read this map This map shows …Dallas Light Pollution Map. This map is a small exerpt (387mi east-to-west, by 346mi north-to-south) from the Light Pollution Atlas 2022 by David Lorenz. David recalculated the The World Atlas of the Artificial Night Sky Brightness with newer data. The central cross marks the location of the Dallas clear sky chart. Tiny …Light pollution, the excessive or inappropriate use of outdoor artificial light, is affecting human health, ... a computer-generated map based on thousands of satellite …Clear Sky Charts. in Wisconsin. Colors indicate light pollution ratings. Only non-private charts in Wisconsin shown: 102 of 6170 in North America. This map shows where astronomy-specific weather forecasts, or "clear sky charts", are available. The colors of the markers indicate amount of light pollution there (colors defined ).The reason for this is light pollution – stray light from urban areas scattered into the night sky. Light pollution is stray light from parking lots, sport complexes, street lights, and other human activity. ... to produce. Cities produce huge amounts of stray light, called light pollution, that scatters into the sky. This NASA map of Southern California …Dallas Light Pollution Map. This map is a small exerpt (387mi east-to-west, by 346mi north-to-south) from the Light Pollution Atlas 2022 by David Lorenz. David recalculated the The World Atlas of the Artificial Night Sky Brightness with newer data. The central cross marks the location of the Dallas clear sky chart. Tiny crosses mark other charts.According to the University of the West of England, a literature map is one that maps literature or literary concepts based on connections and associations. Much like other maps, a...In the ongoing Amsterdam Light Festival, illuminating the city’s waterway, a Serbian artist duo’s installation of an LED version of Vincent Van Gogh’s iconic painting ‘The Starry Night’ has drawn attention to the growing menace of light pollution in urban areas. 7000 kilometres away, in India’s commercial capital …Scientific data, informations, atlases and other on light pollution,night sky brightness,sky glow, nightime lights,naked eye visible stars,limiting magnitude,night-time stellar ... 201MB unzipped). The composite high-resolution maps of individual continents can be downloaded from the relative pages. Be careful because their size is huge. Open a ...Light pollution in urban centers creates a sky glow that can blot out the stars. The brighter the area in this zoomable map, the harder it is to see stars and constellations in the night sky. In the United States, national parks are often a refuge for darkness; national parks are shown in purple in the map below. This map is based on data ...Mapping out your route before you hit the road can save you time, money, and stress. Whether you’re planning a long road trip or just a quick jaunt to a store in the next town over...Mapping multiple locations can be a daunting task, especially if you’re on a tight budget. However, with the right tools and techniques, you can easily map multiple locations for f...In the ongoing Amsterdam Light Festival, illuminating the city’s waterway, a Serbian artist duo’s installation of an LED version of Vincent Van Gogh’s iconic painting ‘The Starry Night’ has drawn attention to the growing menace of light pollution in urban areas. 7000 kilometres away, in India’s commercial capital …Maps are not only practical tools for navigation but also creative outlets for expressing information in a visual and engaging way. Whether you want to create a map for personal us...Light Pollution Map. A color-coded map of the world showing sources and levels of light pollution (man-made light that lights up the night sky and reduces what …Light Pollution map of Qld and Northern NSW. Map created with a section from The Light Pollution Science and Technology Institute and overlayed with Google Map. It is intended as a rough guide only. Mouse over the image for dark sky area. Credit: P. Cinzano, F. Falchi (University of Padova), C. D. Elvidge (NOAA National … 通过波特尔光害等级展示交互式全球光污染地图，帮助你选择全国光污染最少的地方观测星空，为天文摄影爱好者提供sqm在内的光污染指数，找到哪里可以肉眼看到银河。 The interest for the protection of the night sky from light pollution is growing every day. A global scale periodic monitoring of the situation is necessary. Nighttime images of the Earth at night have been obtained from the Defense Metereological Satellite Program (DMSP) of the US Air Force since early '70. The first global image was obtained ...Clear Sky Charts. in New Jersey. Colors indicate light pollution ratings. Only non-private charts in New Jersey shown: 60 of 6170 in North America. Click and drag to pan the map. Even though this map can be zoomed out to show the all of North America, this page only shows charts in New Jersey. The full list is here.CATALYST/MAP GLOBAL EQUITY FUND CLASS C- Performance charts including intraday, historical charts and prices and keydata. Indices Commodities Currencies StocksArcGIS - light pollution map. light pollution map. My map Web Map by ngs_external_9534b3d9_98d4_4092_ae46_3e27a4e51b23_ngmmi. Last Modified: October 1, 2021.Are you looking to add a personal touch to your travel adventures or create a unique visual representation of your neighborhood? Designing your own map is a great way to showcase y...New World Atlas map shows extent of light pollution around the globe . Falchi et al., Science Advances [link TK]; Jakob Grothe/National Park Service, Matthew Price/CIRES and CU-Boulder. Additional Resources. Explore an interactive map to view light pollution's impact across the globe: https://cires.colorado.edu/ artificial-skyA light pollution map showing the location of my backyard. There are a number of ways to measure how much light pollution affects a given location (SQM, NELM), but my personal favorite way to gauge the quality of a location is the Bortle scale.. I have personally battled with light pollution in my backyard when taking deep sky astrophotography images. ...Low light pollution conditions, or dark skies, is one of the most important properties of a good astronmical observing site. This map is a small exerpt (477Km east-to-west, by 556Km north-to-south) from the Light Pollution Atlas 2022 by David Lorenz. David recalculated the The World Atlas of the Artificial Night Sky Brightness with newer data.Maps of the artificial night sky brightness. Maps of the total night sky brightness. Maps of the naked eye stellar visibility. Maps of the number of visible stars. Maps of the growth of …A globe is a three-dimensional object that accurately depicts the geometry of the Earth, while a flat map is a two-dimensional representation that has some distortions. Although gl... light pollution map. My map. Web Map by. ngs_external_9534b3d9_98d4_4092_ae46_3e27a4e51b23_ngmmi. Item created: Sep 27, 2021 Item updated: Oct 1, 2021 View count: 702. Open in Map Viewer. If you’re in the market for a new house, you know how important it is to find the perfect one. Location is key, and one of the best tools at your disposal to help you find your dre... Medium resolution world map. 65S to 75N, 180W to 180E. North America. North America. 7N to 75N, 180W to 51W. South America. South America. 57S to 14N, 93W to 33W. Europe. Europe. 34N to 75N, 32W to 70E. Africa. Africa. 36S to 38N, 26W to 64E. Asia. Asia. 5N to 75N, 60E to 180E. Australia. Australia. 48S to 8N, 94E to 180E. Full resolution world ... The New World Atlas of Artificial Sky Brightness (landing_page) Published. Light pollution in urban centers creates a sky glow that can blot out the stars.light pollution map. Overview. Overview Data Image Management Visualization Preview Preview Tasks Snapshots Layers Usage Datasets Outputs Settings. This layer is editable and shared with the public. To prevent unwanted editing, unshare this item or approve it for public data collection.The light pollution map of Pennsylvania below is based on nighttime images obtained from the Defense Meteorological Satellite Program and is taken from the map of North America from the World Atlas of Artificial Sky Brightness. Click here for original North America map by the Light Pollution Science and Technology Institute. Colors correspond to ratios …Here are some of the more interesting regions around the world. Alternatively, you can also play around with the interactive Google Maps version here. Map shows how little light pollution there is North Korea compared to neighbouring South Korea, Japan, China and even Russia. The one below shows …Most Accurate Light Pollution Map/App - posted in Light Pollution: Does anyone have any idea of what is considered the most accurate map/app for predicting light pollution? Ive perused quite a few and there is some variance between them. On most light pollution maps, it seems there is some guess work …The #WorldRecordLight citizen science challenge will help create a valuable map of light pollution across Australia. Image: Mike Friedrich/Flickr University of Melbourne scientists are leading the call for Australians to step outside on the longest night of the year to help measure light pollution and break a world …Oct 13, 2020 · Recent studies have shown that global light pollution has increased by 2% per year between 2012 and 2016. This 2% growth rate is seen in both the amount of areas lit and the brightness of light. Light pollution increases have resulted from rising per capita light usage and inefficient lighting. Despite the efforts of some cities, like Flagstaff ... Light Pollution Atlas 2020. Attention: a new 2022 Atlas is now available! Welcome to a later version of the World Atlas of the Artificial Night Sky Brightness! I've re-calculated …Globe at Night is an international scientific research program that crowdsources measurements of light pollution in the night sky. At set time periods within each year, the project asks people to count the number of stars that they can see from their location and report it to the project's website. The coordinating researchers …The light pollution map of Pennsylvania below is based on nighttime images obtained from the Defense Meteorological Satellite Program and is taken from the map of North America from the World Atlas of Artificial Sky Brightness. Click here for original North America map by the Light Pollution Science and Technology Institute. Colors correspond to ratios …Maps are not only practical tools for navigation but also creative outlets for expressing information in a visual and engaging way. Whether you want to create a map for personal us...Light pollution is caused by artificial light sources such as street lamps, houses, and skyscrapers. Efforts are being made globally to reduce light pollution, including education campaigns and the use of smart lighting controls and shielded lamps. Humans are naturally afraid of the dark. We sometimes imagine monsters …CATALYST/MAP GLOBAL EQUITY FUND CLASS C- Performance charts including intraday, historical charts and prices and keydata. Indices Commodities Currencies StocksThe map was obtained from data taken in 1996-1997 rescaled to 1998-1999 based on the fitting to observations of night sky brightness taken from the Earth surface. Each pixel is 30''x30'' in size in longitude/latitude projection, corresponding approximately to 0.9x0.6 km at a latitude of 45°N.Choices: Add Light Pollution map: Intensity: 0% 100% | Show All Charts | Show detailed list: Colors indicate light pollution ratings. Only non-private charts in Ohio shown: 125 of 6171 in North America. Zoom out to All Charts Map (slow) Nearby: Indiana Kentucky Michigan Pennsylvania West Virginia: How to read this map This map shows …Light Pollution Map Integrated Light Pollution Map helps you find the darkest places near you for the best viewing of the night sky. Includes the ability to save and load your favorite dark sky locations, fully adjust the light pollution map overlay opacity and map type, and a unique "horizon safe radius tool" to avoid light pollution on the …Globe At Night | AppTypically, light pollution maps depict intensities about one or even two Bortle darkness classes too dark for specific locations in the eastern U.S., at the same time suggesting a more rapid drop-off in …Definition of light pollution. Light pollution is the human-made alteration of outdoor light levels from those occurring naturally. When we over-light, fail to use timers and sensors, or use the wrong color of light, we can negatively affect many parts of our world, including migratory birds, pollinators, sea turtles, and mammals, including …It’s impossible to create a perfect map, but that hasn’t stopped Nokia from trying. Here, we go inside the company’s neverending drive to create a digital copy of the world. It’s i...Dallas Light Pollution Map. This map is a small exerpt (387mi east-to-west, by 346mi north-to-south) from the Light Pollution Atlas 2022 by David Lorenz. David recalculated the The World Atlas of the Artificial Night Sky Brightness with newer data. The central cross marks the location of the Dallas clear sky chart. Tiny …Light Pollution map of Qld and Northern NSW. Map created with a section from The Light Pollution Science and Technology Institute and overlayed with Google Map. It is intended as a rough guide only. Mouse over the image for dark sky area. Credit: P. Cinzano, F. Falchi (University of Padova), C. D. Elvidge (NOAA National Geophysical Data Center ...Google Maps is celebrating "Mario Day" by letting you turn Maps into Mario Kart. Here's how By clicking "TRY IT", I agree to receive newsletters and promotions from Money and its p...Low light pollution conditions, or dark skies, is one of the most important properties of a good astronmical observing site. This map is a small exerpt (381mi east-to-west, by 346mi north-to-south) from the Light Pollution Atlas 2022 by David Lorenz. David recalculated the The World Atlas of the Artificial Night Sky Brightness with newer data.Light Pollution Map . You can also access a light pollution map to determine your level of light pollution that will provide the Bortle Scale classification. This can come in handy if you are looking to travel to darker skies in order to capture a landscape photo of the Milky Way or a deep-sky object.Map A shows the current level of sky brightness across Europe, while Map B estimates sky brightness should we use 4000K CCT LED street lights (Credit: F. Falchi, et al., CC BY-NC)Dark Sky Map contains Google Maps overlays and allows astronomers to search for suitable spots using the satellite view and data from light pollution charts. You can add a spot to the map and a description is automatically populated with an overview of the quality of the sky in that location and ratings from other stargazers.Scientific data, informations, atlases and other on light pollution,night sky brightness,sky glow, nightime lights,naked eye visible stars,limiting magnitude,night-time stellar visibility,measurements from DMSP satellites, light pollution science and technology institute, Dati scientifici, informazioni, mappe, atlanti su inquinamento luminoso, brillanza …Maps are important to locate important places, study and compare different locations and even predict the weather. There are many different types of maps, including floor plans, to...Jan 24, 2024 · Light Pollution is the introduction of artificial light, either directly or indirectly, into the natural environment. Public awareness of light pollution is generally traced back to vocal amateur and professional astronomers during the 1970s and 1980s, though the writer-naturalist Henry Beston spoke poetically about the loss of natural darkness ... Scientific data, informations, atlases and other on light pollution,night sky brightness,sky glow, nightime lights,naked eye visible stars,limiting magnitude,night-time stellar visibility,measurements from DMSP satellites, light pollution science and technology institute, Dati scientifici, informazioni, mappe, atlanti su inquinamento luminoso, brillanza …In Indiana, light pollution levels can range from Bortle Class 1 (darkest skies) to Class 9 (brightest urban areas). Using a resource like the ClearDarkSky Light Pollution Map, you can identify the Bortle scale ratings for different locations throughout the state, making finding the best spots for …The IAU Resolution B5 of 2009 resolved to encourage its membership to raise awareness of and attempt to abate light pollution at local, regional, national, or international levels (IAU, 2009). More recently, the IAU, the UN Office of Outer Space Affairs, and the Government of Spain organised two workshops in 2020 and 2021, …The light pollution map has two base layers (road and hybrid Bing maps), VIIRS/World Atlas/Clouds/Aurora overlays and a point feature overlay (SQM, SQC and Observatories). If you want detailed analysis of radiance (VIIRS/DMSP) changes over a period of time, then please use the Lighttrends web application (not mobile optimised).The #WorldRecordLight citizen science challenge will help create a valuable map of light pollution across Australia. Image: Mike Friedrich/Flickr University of Melbourne scientists are leading the call for Australians to step outside on the longest night of the year to help measure light pollution and break a world …Mar 11, 2019 ... The website, created as part of a European Union-funded project known as GEOEssential, allows users to zoom in on specific regions and go back ...It was long overdue, but this map has now been updated with more recent light pollution information. The years 2006, 2016, 2020, and 2022 can all be selected on the map. …Maps of the artificial night sky brightness. Maps of the total night sky brightness. Maps of the naked eye stellar visibility. Maps of the number of visible stars. Maps of the growth of …Interactive Light Pollution Map © 2020 GBNP Foundation | Join Our Mailing List Donate Join Our Mailing List DonateDec 13, 2019 · Today’s map, from geographer and journalist, Tim Wallace, is a different perspective on light pollution in the United States. The map was created by subtracting population from light output, which highlights areas that throw off more light than predicted given their population density. On this style of map, it isn’t the glowing metropolitan ... Light pollution threatens aquatic ecosystems by increasing the risk of harmful algae blooms. It also impacts our quality of life by eradicating our access to the wonder of beautiful night skies. Help us save the night . The good news is, the solution is as easy as screwing in a lightbulb. Light pollution is something we can all help erase, in …Light pollution in urban centers creates a sky glow that can blot out the stars. The brighter the area in this zoomable map, the harder it is to see stars and constellations in the night sky. In the United States, national parks are often a refuge for darkness; national parks are shown in purple in the map below. This map is based on data ...Clear Sky Charts. in Wisconsin. Colors indicate light pollution ratings. Only non-private charts in Wisconsin shown: 102 of 6170 in North America. This map shows where astronomy-specific weather forecasts, or "clear sky charts", are available. The colors of the markers indicate amount of light pollution there (colors defined ).in Florida. Colors indicate light pollution ratings. Only non-private charts in Florida shown: 187 of 6170 in North America. This map shows where astronomy-specific weather forecasts, or "clear sky charts", are available. The colors of the markers indicate amount of light pollution there (colors defined ). You can: Click and drag to pan the map.The primary use is to show VIIRS/DMSP data in a friendly manner, but over time it also included some other interesting overlays that concern light pollution like SQM/SQC, World Atlas 2015 zenith brightness, clouds, aurora and IAU observatories. If you have a permanent SQM reader installed you can add it to the …Dark Sky Map. Our ambition is to make astronomy accessible to everyone. In this quest, we invite you to explore a map that helps you find the best places to observe the night sky as well as a map of light pollution as a decision making tool. Find locations suitable for stargazing, a light pollution map, accessibility by car, space to park ...A map showing the domain of the 6 continent-scale maps is below. There are two versions of each map: one with borders and coastlines and the other with nothing except light pollution. The resolution of most maps is 1/120 degrees. The medium resolution world maps are 1/40 degrees. I've used an "expanded color scale" for …Aug 22, 2016 · The real power of the Blue Marble and Lightpollution.info maps is in the ability to look at regions of the Earth over time to see whether the amount of light leaving the ground is changing for better — or worse. This image compares VIIRS images of the Niger River delta in southern Nigeria in 2012 (left) and 2015 (right). On this map, light pollution in low-populated areas shows the site of industrial activity, including shale oil extraction. From the bright lights of Times Square to the high-powered flood lights of a suburban Walmart, we expect our cities to give off a certain amount of light pollution. Even though our view of the …Light pollution in urban centers creates a sky glow that can blot out the stars. The brighter the area in this map the harder it is to see stars and constellations in the night sky. The Milky Way, the brilliant river of stars that has dominated the night sky and human imaginations since time immemorial, is just a faded memory for one third of humanity and … The New World Atlas of Artificial Sky Brightness (landing_page) Published. Light pollution in urban centers creates a sky glow that can blot out the stars. Interactive Light Pollution Map © 2020 GBNP Foundation | Join Our Mailing List Donate Join Our Mailing List Donate Medium resolution world map. 65S to 75N, 180W to 180E. North America. North America. 7N to 75N, 180W to 51W. South America. South America. 57S to 14N, 93W to 33W. Europe. Europe. 34N to 75N, 32W to 70E. Africa. Africa. 36S to 38N, 26W to 64E. Asia. Asia. 5N to 75N, 60E to 180E. Australia. Australia. 48S to 8N, 94E to 180E. Full resolution world ... Light pollution, or photo pollution, is the presence of excess artificial light and is the result of urbanization and industrialization. It is only one of the many forms of pollution on Earth ...Light Pollution map of Qld and Northern NSW. Map created with a section from The Light Pollution Science and Technology Institute and overlayed with Google Map. It is intended as a rough guide only. Mouse over the image for dark sky area. Credit: P. Cinzano, F. Falchi (University of Padova), C. D. Elvidge (NOAA National Geophysical Data Center ...1 day ago · Light Pollution Map. A color-coded map of the world showing sources and levels of light pollution (man-made light that lights up the night sky and reduces what astronomers can see). It is a mirror of David Lorenz's Light Pollution Atlas 2020, but superimposed on Open Street Maps. Used by many to find good observing sites. The primary use is to show VIIRS/DMSP data in a friendly manner, but over time it also included some other interesting overlays that concern light pollution like SQM/SQC, World Atlas 2015 zenith brightness, clouds, aurora and IAU observatories. If you have a permanent SQM reader installed you can add it to the …Dimming bright city lights for as little as 30 minutes can prevent fatal bird collisions, according to a 2017 study. If advocating for policy changes feels daunting, start small, says Kyba ... Light pollution in urban centers creates a sky glow that can blot out the stars. The brighter the area in this zoomable map, the harder it is to see stars and constellations in the night sky. In the United States, national parks are often a refuge for darkness; national parks are shown in purple in the map below. This map is based on data ... Light Pollution Map. A color-coded map of the world showing sources and levels of light pollution (man-made light that lights up the night sky and reduces what astronomers can see). It is a mirror of David Lorenz's Light Pollution Atlas 2020, but superimposed on Open Street Maps. Used by many to find good observing sites. The light pollution map has two base layers (road and hybrid Bing maps), VIIRS/World Atlas/Clouds/Aurora overlays and a point feature overlay (SQM, SQC and Observatories). If you want detailed analysis of radiance (VIIRS/DMSP) changes over a period of time, then please use the Lighttrends web application (not mobile optimised). Navigating has come a long way since the days of wrestling with paper maps that never seemed to fold up right again once you opened them. Google Maps is one navigational tool that ... | Cpnubyfcejj (article) | Mfdcel.